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Accounts Receivable (Tables) | 12 Months Ended
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Dec. 31, 2012
Accounts Receivable, Net of Allowances | Accounts receivable, net of allowances, consisted of the following (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Accounts receivable |  | $ | 95,515 |  |  | $ | 118,138 |
Less: allowance for doubtful accounts, returns and discounts |  |  | (9,595 | ) |  |  | (8,252 | )
|  | $ | 85,920 |  |  | $ | 109,886 |
Summary of Activity in Allowances for Doubtful Accounts, Returns and Discounts | The following is a summary of activity in allowances for doubtful accounts, returns and discounts for the three years ended December 31, 2012, 2011 and 2010 (in thousands):
|  | Balance at Beginning of Period |  |  | Charges to Revenue |  |  | Charges (Credits) to Expense |  |  | Additions to (Deductions from) Reserves |  |  | Balance at End of Period |
Year ended December 31, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 |  | $ | 8,252 |  |  | $ | 3,141 |  |  | $ | 461 |  |  | $ | (2,259 | ) |  | $ | 9,595 |
2011 |  | $ | 5,897 |  |  | $ | 2,620 |  |  | $ | 615 |  |  | $ | (880 | ) |  | $ | 8,252 |
2010 |  | $ | 5,163 |  |  | $ | 1,533 |  |  | $ | 1,056 |  |  | $ | (1,855 | ) |  | $ | 5,897 |

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- Definition Receivables trade and other accounts receivable allowance for doubtful accounts returns and discounts. + References No definition available. + Details
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Namespace Prefix: | hlit_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Summary of activity in allowances for doubtful accounts, returns and discounts. + References No definition available. + Details
Name: | hlit_SummaryOfActivityInAllowancesForDoubtfulAccountsReturnsAndDiscountsTableTextBlock
Namespace Prefix: | hlit_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration